CVE-2025-5777HIGH 7.5CISA KEVEPSS p100.0%
CVE-2025-5777Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability
Citrix / NetScaler ADC and Gateway
Description
Citrix NetScaler ADC and Gateway contain an out-of-bounds read vulnerability due to insufficient input validation. This vulnerability can lead to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server.
Scoring
| CVSS 3.1 | 7.5 (HIGH) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| EPSS | 99.90% probability of exploitation · percentile 100.0% · 2026-06-15T12:03:41Z |
| Published | 2025-06-17 |
| Last modified | 2025-10-30 |
CISA KEV entry
Added to KEV: 2025-07-10
Underlying weaknesses· 3
References
- https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420
- https://citrixbleed.com
- https://horizon3.ai/attack-research/attack-blogs/cve-2025-5777-citrixbleed-2-write-up-maybe/
- https://labs.watchtowr.com/how-much-more-must-we-bleed-citrix-netscaler-memory-disclosure-citrixbleed-2-cve-2025-5777/
- https://www.bleepingcomputer.com/news/security/cisa-tags-citrix-bleed-2-as-exploited-gives-agencies-a-day-to-patch/
- https://www.netscaler.com/blog/news/netscaler-critical-security-updates-for-cve-2025-6543-and-cve-2025-5777/
- https://www.theregister.com/2025/07/10/cisa_citrixbleed_kev/
- https://doublepulsar.com/citrixbleed-2-exploitation-started-mid-june-how-to-spot-it-f3106392aa71
3
| Type | Target | Confidence | Tier |
|---|---|---|---|
| Weakness | Out-of-bounds Readcwe-125 | 0% | live |
| Weakness | Use of Uninitialized Variablecwe-457 | 0% | live |
| Weakness | Use of Uninitialized Resourcecwe-908 | 0% | live |
(incoming)1
| Type | Target | Confidence | Tier |
|---|---|---|---|
| KEVEntry | Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerabilitykev-cve-2025-5777 | 0% | live |
Related by meaning· 6
Nearest entities by semantic similarity across the cs-graph corpus.